3
2
TABLE OF CONTENTS
PRELIMINARY EXAMINATION . . . . . . . . . . . . . . . . . . 4
GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . 4
FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . . . . . 6
MECHANICAL DIMENSIONS . . . . . . . . . . . . . . . . . . 7
SPECIFICATIONS
HI 21
&
HI 22 . . . . . . . . . . . . . . .
8
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
SETUP MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
CONTROL MODE . . . . . . . . . . . . . . . . . . . . . . . . . 17
IDLE MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
ANALOG OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . 26
RS485 COMMUNICATION & DATA LOGGING . . . . 28
CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
LAST CALIBRATION DATA . . . . . . . . . . . . . . . . . . . . 48
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
FAULT CONDITIONS AND SELFTEST PROCEDURES . . 52
pH VALUES AT VARIOUS TEMPERATURES . . . . . . . . . 56
ELECTRODE CONDITIONING AND MAINTENANCE . . 57
TAKING REDOX MEASUREMENTS. . . . . . . . . . . . . . 61
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
CE DECLARATION OF CONFORMITY . . . . . . . . . . . 70
© 2002 Hanna Instruments
All rights are reserved. Reproduction in whole or in part is prohibited without the
written consent of the copyright owner.
Dear Customer,
Thank you for choosing a Hanna Product.
Please read this instruction manual carefully before using the
instrument. It will provide you with the necessary information
for the correct use of the instrument, as well as a precise idea
of its versatility.
If you need additional technical information, do not hesitate
to e-mail us at
.
These instruments are in compliance with the
directives.
MODELS
The models
HI 21XYZ
are pH controllers, while the models
HI 22XYZ
are ORP controllers.
HI 21111
pH Controller with single setpoint, ON/OFF
control, analog output
HI 21211
pH Controller with dual setpoint, ON/OFF
control, analog output
HI 21221
pH Controller with dual setpoint, proportional
and ON/OFF controls, analog output
HI 21222
pH Controller with dual setpoint, proportional
and ON/OFF controls, RS485 output
HI 21523
pH Controller with control through analog
output, proportional and ON/OFF controls,
analog and RS485 outputs
HI 22111
ORP Controller with single setpoint, ON/OFF
control, analog output
HI 22122
ORP Controller with single setpoint, propor-
tional and ON/OFF controls, RS485 output
